Influence of Near Tasks on Posture in Myopic Chinese Schoolchildren.
Influence of Near Tasks on Posture in Myopic Chinese Schoolchildren.
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近距离任务对中国近视学童姿势的影响。
DOI：
10.1097/opx.0000000000000658
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发表时间：
2015-08
期刊：
影响因子：
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通讯作者：
Lu F
中科院分区：
文献类型：
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作者：
Bao J;Drobe B;Wang Y;Chen K;Seow EJ;Lu F
调查中国近视学龄儿童的近视姿势，并比较不同近视任务（即，玩视频游戏、阅读和写作）。该研究调查了120名近视儿童（1至6级，6至13岁）。当受试者玩电子游戏或在桌子上阅读或写作时，使用电磁运动跟踪系统连续测量受试者的工作距离和头部下降。阅读和写作文件按年级进行调整（即，等级1至2、3至4和5至6）。为了进行分析，根据受试者的中位等效球镜屈光不正（− 1.50 D）将其分为两个屈光组。近视学童在所有任务中使用近距离工作：21.3 ± 5.2 cm（视频游戏），27.2 ± 6.4 cm（阅读）和24.9 ± 5.8 cm（书写）。平均头部倾斜度为63.5 ± 12.2度（视频游戏）、37.1 ± 12.8度（阅读）和44.5 ± 14.1度（书写）。在阅读和写作任务中，工作距离随着时间的推移显著降低（p < 0.001）。头部下降仅在阅读任务中随时间显著增加（p < 0.001）。年级水平对工作距离有显著影响，但以被试体型调整工作距离后，差异不显著。在姿势数据方面，屈光或屈光迟滞组之间没有观察到差异（p > 0.05）。工作距离与头部下降呈负相关（r =-0.53，p < 0.001）。近工作距离观察中国近视学童。专注于每项任务的注意力、任务难度和页面/屏幕大小可能会影响近工作距离和头部下降。根据先前的研究，手持视频游戏与最近的工作距离有关，这可能是近视进展的风险因素。
To investigate near-vision posture in Chinese myopic schoolchildren and compare near-vision posture during different near-vision tasks (i.e., playing video games, reading, and writing). The study investigated 120 myopic children (grades 1 through 6 and aged 6 to 13 years). An electromagnetic motion-tracking system was used for continuous measurements of the working distance and head declination of the subjects while they were playing video games or reading or writing at a desk. The reading and writing documents were adjusted by grade level (i.e., grades 1 to 2, 3 to 4, and 5 to 6). For analysis, the subjects were grouped in two refractive groups according to their median spherical equivalent refractive error (−1.50D). The myopic schoolchildren used close working distances for all tasks: 21.3 ± 5.2 cm (video games), 27.2 ± 6.4 cm (reading), and 24.9 ± 5.8 cm (writing). The mean head declinations were 63.5 ± 12.2 deg (video games), 37.1 ± 12.8 deg (reading), and 44.5 ± 14.1 deg (writing). Working distance decreased significantly across time for the reading and writing tasks (p < 0.001). Head declination increased significantly across time only for the reading task (p < 0.001). Grade level significantly influenced working distance, but the difference was not significant when working distance was adjusted by the subject’s size. No differences were observed within the refractive or the accommodative lag groups in terms of the posture data (p > 0.05). Working distance was negatively correlated with head declination (r = −0.53, p < 0.001). Close working distances were observed for Chinese myopic schoolchildren. The attention dedicated to each task, the task difficulty, and the page/screen size may affect near working distance and head declination. Handheld video games were associated with the closest working distance, which may be a risk factor for myopia progression, according to previous studies.